Income Taxes - Difference Between U.S. Statutory Tax Rate and Effective Income Tax Rate (Detail)	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefit	6.50%	6.50%	6.50%
Federal and state tax credits	(2.60%)	(8.60%)	(5.50%)
Impact of change in state tax rate	0.10%	0.50%	1.20%
Changes in uncertain tax positions	(1.70%)	(1.40%)	(7.20%)
Nondeductible expenses and other, net	1.90%	3.10%	2.40%
Annual effective tax rate	39.20%	35.10%	32.40%